Android 4.2 brings an extensive security update to the mobile OS, Paypal offers price matching for the holidays, Facebook moves to close a security loophole, and also tests a service offering free WiFi to users who check in.

PayPal offers price matching, free return shipping for the holidaysFor holiday shoppers who may be leery of the service, PayPal is offering free return shipping and price matching for merchandise that has gone on sale elsewhere within 30 days of purchase. All users need to do is submit a form with a copy of their receipt and the relevant advertisement. [GigaOm]

Facebook tests free Wi-Fi hot spots in exchange for check-insPatrons of "a few local businesses" in partnership with Facebook will be able to access free WiFi hotspots if they check in to their respective location. No word on when or where, but those who'd rather not check in or don't have a Facebook account won't be left out in the cold either-a password will be provided by the business. [CNET]